Propane Device Identification

[olemax]

Need knowledgeable help with identifying the device in the photo. This is in the pigtail on driver’s side propane tank on my 2011 Sabre RETS31.
The passenger side pigtail connects directly to the switch over valve.
Thanks in advance for your help.
Olemax

[emm-dee]

Originally Posted by olemax

Need knowledgeable help with identifying the device in the photo. This is in the pigtail on driver’s side propane tank on my 2011 Sabre RETS31.
The passenger side pigtail connects directly to the switch over valve.
Thanks in advance for your help.
Olemax

No pix.

[olemax]

Originally Posted by emm-dee

No pix.

Sorry, I can’t seem to be able to get them to attach. [emoji848]

[olemax]

Here is the picture. Sorry about that.

[Bama Rambler]

That's a single stage regulator. It lowers the pressure from vapor pressure to about 30 psig (the set pressure will be stamped on it). They're a common item in fifth wheel propane installations.